<!--
 * @Author: wwssaabb
 * @Date: 2021-07-20 11:27:54
 * @LastEditTime: 2021-07-20 15:07:23
 * @FilePath: \demo\react_demo\demo\base_demo\refs_demo.html
-->

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="test"></div>

  <script type="text/javascript" src="../js/react.development.js" ></script>
  <script type="text/javascript" src="../js/react-dom.development.js" ></script>
  <script type="text/javascript" src="../js/babel.min.js" ></script>
  <script type="text/javascript" src="../js/prop-types.js" ></script>
  <script type="text/babel">  /* JSX 语法用babel转换 */
    /* class Demo extends React.Component{
      show=()=>{
        console.log(this.refs.input1.value)
        alert(this.refs.input1.value)
      }
      blur=()=>{
        alert('input2 is blur')
      }
      render(){
        return (
          <div>
            <input ref='input1' type="text" placeholder='点击右侧的按钮提示数据' />
            <button onClick={this.show}>点我提示左侧的数据</button>
            <input ref='input2' type="text" placeholder='失去焦点提示数据' onBlur={this.blur}/>
          </div>
        )
      }
    } */
    class Demo extends React.Component{
      show=()=>{
        alert(this.input1.value)
      }
      blur=()=>{
        console.log('input2 is blur')
      }
      render(){
        return (
          <div>
            <input ref={e=>this.input1=e} type="text" placeholder='点击右侧的按钮提示数据' />
            <button onClick={this.show}>点我提示左侧的数据</button>
            <input ref='input2' type="text" placeholder='失去焦点提示数据' onBlur={this.blur}/>
          </div>
        )
      }
    }
    
    ReactDOM.render(<Demo/>,document.getElementById('test'))

  </script>
</body>
</html>